| Autor: |
Lin, Yuhan, Li, Guanzhou, Wu, Sisi, Wang, Yating, Xie, Tangtang, Li, Jie, Shi, Zhicong |
| Zdroj: |
ACS Applied Nano Materials; 6/23/2023, Vol. 6 Issue 12, p10322-10328, 7p |
| Abstrakt: |
Zn–air battery with advantages of high capacity, safety, and environmental friendliness is an ideal candidate for the next-generation energy conversion and storage system. Highly efficient oxygen reduction reaction catalysts with low cost play an important role in Zn–air batteries. Herein, a LaCoO3−δ–CoO–partially exfoliated carbon nanotube (CNT) composite (LaCoO3−δ–CoO–CNT) is synthesized through a facile ball milling process. With the help of the sufficient energy input through ball milling, the CNT is partially exfoliated with LaCoO3−δ–CoO. The half-wave potential of LaCoO3−δ–CoO–CNT reaches 0.74 V vs RHE, and its average electron transfer number (n = 3.82) is close to 4. The working voltage of Zn–air battery with LaCoO3−δ–CoO–CNT as cathode catalyst reaches 1.26 V at 5 mA cm–2 and 1.19 V at 20 mA cm–2. In addition, the battery can maintain a stable working voltage during the long-time galvanostatic discharge at different current densities. The enhanced catalytic ability of LaCoO3−δ–CoO–CNT is mainly due to the synergistic effect of LaCoO3−δ and CoO, partially exfoliated CNT, and abundant oxygen vacancies. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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